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arXiv 1302.0170astro-ph.SR
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超新星2012 ec:用PESSTO识别祖先和早期监测

Supernova 2012ec: Identification of the progenitor and early monitoring with PESSTO

J. R. Maund, M. Fraser, S. J. Smartt, M. T. Botticella, C. Barbarino, M. Childress, A. Gal-Yam, C. Inserra, G. Pignata, D. Reichart, B. Schmidt, J. Sollerman, F… 展开作者

J. R. Maund, M. Fraser, S. J. Smartt, M. T. Botticella, C. Barbarino, M. Childress, A. Gal-Yam, C. Inserra, G. Pignata, D. Reichart, B. Schmidt, J. Sollerman, F. Taddia, L. Tomasella, S. Valenti, O. Yaron

摘要:

我们在档案爆炸前HST WFPC 2和ACS/WFC F814 W图像中识别了IIP SN 2012 ec型的祖先。在爆炸前WFPC 2 F450 W和F606 W图像中未检测到祖物质的属性进一步受到限制。我们报告了SN 2012 ec的一系列早期光度和光谱观测结果。r '-带光曲线显示M(r')=-17.0的平台。早期光谱与IIP SN 1999 em相似,在发现后1天,在H α吸收最小值处测得的膨胀速度为-11,700 km/s。SN 2012 ec的光度和光谱演化表明它是一个IIP型SN,在爆炸后几天(<6d)才被发现。与MARCS模型的SEDs相比,我们得到了原始恒星的光度为log L/Lsun = 5.15+/-0.19,由此我们推断其初始质量范围为14- 22 Msun。这是第一个有确定祖先的SN,随后是公共ESO瞬态天体光谱调查(PESSTO)。

英文摘要:

We present the identification of the progenitor of the Type IIP SN 2012ec in archival pre-explosion HST WFPC2 and ACS/WFC F814W images. The properties of the progenitor are further constrained by non-detections in pre-explosion WFPC2 F450W and F606W images. We report a series of early photometric and spectroscopic observations of SN 2012ec. The r'-band light curve shows a plateau with M(r')=-17.0. The early spectrum is similar to the Type IIP SN 1999em, with the expansion velocity measured at Halpha absorption minimum of -11,700 km/s (at 1 day post-discovery). The photometric and spectroscopic evolution of SN 2012ec shows it to be a Type IIP SN, discovered only a few days post-explosion (<6d). We derive a luminosity for the progenitor, in comparison with MARCS model SEDs, of log L/Lsun = 5.15+/-0.19, from which we infer an initial mass range of 14-22Msun. This is the first SN with an identified progenitor to be followed by the Public ESO Spectroscopic Survey of Transient Objects (PESSTO).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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